This research is being done to determine whether transcranial direct current stimulation (tDCS) can improve certain mental abilities and alter functional connectivity in individuals with Schizophrenia. In this research, a 9 volt battery is used to deliver very weak electrical current to the surface of the scalp while participants complete cognitive tasks. Participants also receive a brain scan before and after stimulation. Our aim is to determine if tDCS can improve mental abilities in individuals with schizophrenia.